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When redrawing the figure for this Research Methods & Reporting article by S J Lord and colleagues (BMJ 2010;343:d4684, doi:10.1136/bmj.d4684), we misplaced the words “no action,” “monitor,” and “treat” on the x axis. These decisions are based on clinical factors and so should have been placed in the body of the figure. The corrected figure is given here⇓.